11.24: Two wave pulses travel to the right towar :lqe *vcgdo jjiq4m 3v/h9h0*w;e*mrd a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the pulses when the centers of the individual pulses coincidh0*m qrjc me gov :qv*iehwd*;943lj /e?

  08.30: A light beam passes througzdp zw x6.r ;,d39opuoh the air and strikes the surface of a plastic block. Which pair of star6 ,d3xzpdo.; o9 upwztements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward thri 4ub+mk6zax5ough the point labeled B in the diagram shown. The ray reachesxa ukz+i6b54m a flat mirror placed at an angle $\Theta$ to the horizontal as shown. Which one of the locations labeled in the figure best represents the point through which the ray reflected from the mirror will pass?

  00.04: Specular reflection occurs q; 92 mk nxowb2otynoyd )*rd3+ f3c4uwhenever light is incident on

  05.18: A student hold a hand mirror to observe the back of her head brm7zl38 67 m4kto krowhile standing in front of and looking into a wall mirror. If she is standing 4 ft in front of tt oz8mr6 kl 43ombrk77he wall mirror and she holds the hand mirror 1 ft behind her head, she will see the back of her head how far behind the wall mirror?

  14.25: It is observed that arcc5i r (bs8 3yy/fry- light ray changes direction when it enters a new material. Which one of the following choices is the term best associated with this phenomenon y 85 r(c3/ybsic-rfyr?

  96.19: Light that has wa5, 4tyqvmjz0/dg3nf nvelength of 500 nm in air has wavelength 400 nm in a transparent material. What is the index g / tm3dv4nyzn0 q,5jfof refraction of the material?

  98.04: As sound travels from steel into air, both its speed and u 6 f0oqpu9ns3its:

  00.01: As a wave moves from one medicjznty *24qz7 scq -t8um to a second medium with a different index of refraction which of the following wave propern8tq-s4tcqcz*yj7 2z ties would NEVER change?

  05.47: A sound wave genera / i8nuu ds-1)rgclv80nj -lblted from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/n1-j ildrs 8 )vunb0c-lu8lg/s). Which statement is true about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emits , ;z9vmc t6n8 d oh4v6 nlfo95ibiidr)a sound wave that travels toward the surface of the water. In the water, the sound wave hoivo )fnin; b 59tcdlmvh96di4 z 6,8ras a frequency $f_{water}$, wavelength $\lambda_{water}$ , and wave speed $v_{water}$ . When the sound wave enters the air it has a frequency $f_{air}$ ,wavelength $\lambda_{air}$, and wave speed $v_{air}$ . Which one of the following relationships correctly compares the frequencies, wavelengths, and wave speeds of the waves in the air and water?

  02.33: A short burst xy y 0i21ffp.kfsm;4 it,t/io of white light strikes a rectangular glass block with an angle of incidence ifkoty4 p2 st.1x y0mfi,;/ fiof $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed toward a point P on a bound ) e:t/ ku:;elbt 9l7tkuewdqosn 6*h-ary as shown to the right. Which segment best rep9-/lelu6*e:td k )b7 ;kusowht n qet:resents the refracted ray?

  98.17: Which diagram +e8wsioc3)nu .x9n(no;ex l ybest represents what happens to a ray of light entering air frui e89o3+eco )x . ;nxlysnw(nom water? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence for which th m: +wc8:n , u3eumjjjlpyc6a4e angle of eajlm3::,n6+ u cpc mj jyw8u4refraction is:

  95.12: The principle underlying fiber opti dyon/p9tyt *ilzjr15j +(i :wcs is:

  98.36: The critical angle in a transparent substance surroundedb5)e 22m kwgz7mf4xph by air is $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from mat) c8a+2sk .lw)h4w0h t*wnnyyc)2 wgz+tvjsv erial X with an index of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. Ifk2n )*vzt+lvh4ws2 .aj+)0n s8yycwh w)wgct the speed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and a piece 8pufu3u kkd4e 939avwof glass by observing the critical angle of 3uev4uua9 f 93wk8dkpthe light in each material. Glass with an index of refraction of 1.52 has a critical angle of $41.1^{\circ}$ while a diamond with an index of refraction of 2.42 would have a critical angle of:

  05.26: Light shines from air into a c/ 4 w:tpddmg7ulear material. When the light makes an angle of incidence 7ddw 4/ tg:pumequal to $30.0^{\circ}$, the light refracts at an angle of 1$5.0^{\circ}$. If the light is shone from an angle of incidence of $60.0^{\circ}$, what is the angle of refraction?

  95.40: A Metrologic laser is embedded in a m8j(polzcamd se2)e( lhj zi;m fqf d)/i0:7/waterial of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the laser and target. The valu( h/(iqwficjfd;zdsm)8 )eo2zja l em70/ pl:e of n is:

  95.31: A beam of lighxm))w h ks 9we 4c7xp11rvhi9,1e merht passes from medium 1 to medium 2 to medium 3 as shown in the accop)xxrvmh97ewes 1e9r1, 1)c h ihkm4wmpanying figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 as sho12b(nwuja glr)7e o c4wn in the diagram. What may be concluded about the threew4blnuga2)1 (cr7j eo indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes passing t,a7oyo2+q u/j2c(t d*k gbsjf hrough three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of the following best describes thysocf27u*+(, dbajq/k 2 jgot e relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatq p;d) 7zr8eocz9z0fsic light ray traveling through three medis 8qzd 0foc;9ezpr)7za.The symbols $v_1$,$\lambda_1$ , and $f_1$ represent the speed, wavelength, and frequency of the light in Medium 1, respectively. Which of the following relationships for the light in the three media is true?

  99.26: A beam of light traveling id 9q7g5 r3j 6 ll,mllatm/o8gnn glass ($n_g$=1.5) strikes a boundary with air ($n_a$ =1.0) at point P.The angle
of incidence is $60^{\circ}$ as shown in the diagram. Which ray would best indicate the beam’s path after point P?

  04.35: A ray of light is incident on the surface of a rectangular block of glagywn/a s cv11osb: t53ss at an angst5/a1cn y1:wv3o g sble of $45^{\circ}$. It refracts into the glass and then strikes the side of the block as shown in the diagram. What would be the most likely path of the light after striking the side of the glass block?

  13.27: Light of wavelength 600nm is transmitted fromu7anx2zfz 9z 6jqb2 v4t.jr,u air into a piece of glass. Which one of the labeled arrows best indicates the path o zrj9u4bzfx6u.2 v nq72z, jatf the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right jz -txnmz4v1+-triangular glass as shown. The glass has an index of refractionjxm+n-4 1 zvzt of 2.00 and it is surrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?